Rear View of Master Control Panel Wiring, San Francisco State College (Alternate View) (Updated three months ago)

You can view this bundle in the SFSU Over the Years collection area.

An alternate view of the rear of a master control panel reveals internal wiring, terminal connections, and control components used to manage and synchronize analog systems. The exposed layout highlights the complexity and manual configuration of mid-20th-century electronic equipment.

Tags: historic technology

Added to SFSU Over the Years on July 31, 2026.

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Information

  • Identifier: TP-ATA-1873
  • Context: <p><strong>&nbsp;</strong><strong>Wiring Harness</strong></p> <ul> <li>The tightly bundled wires leading to a central terminal strip is typical for master control panels&mdash;allowing external connections to be routed cleanly from the inside.</li> <li>Those bundles likely connect to:</li> <ul> <li>Other simulation equipment</li> <li>Signal amplifiers or conditioners</li> <li>The CRT monitor or oscilloscope interface</li> </ul> <li>The backs of panel meters can be clearly seen, as well as trimpots or resistors soldered directly to terminals&mdash;used for fine calibration of each circuit.</li> </ul> <p>&nbsp;<strong>Terminal Blocks</strong></p> <ul> <li>The bottom section houses neat <strong>terminal screw strips</strong>&mdash;textbook 1960s analog control design.</li> <li>Wires are color-coded or labeled for system interfacing&mdash;helping operators trace signal paths for diagnostics or experimentation.</li> </ul> <p>&nbsp;<strong>Label: &ldquo;POLAROID&rdquo;</strong></p> <ul> <li>That small label in the corner ("POLAROID") may indicate the <strong>metal case or box was repurposed</strong> from a Polaroid equipment housing or lab tool.</li> </ul> <p>&nbsp;This would&rsquo;ve been <strong>part of a student-visible demo or instructor-led experiment</strong>, allowing:</p> <ul> <li>Real-time <strong>manipulation of analog variables</strong></li> <li>System <strong>monitoring and fault simulation</strong></li> <li>Possibly even <strong>troubleshooting exercises</strong> for control systems</li> </ul> <p>&nbsp;</p> <p><strong>Credits:</strong>&nbsp;</p> <p>Some technical descriptions and historical interpretations were developed with the assistance of ChatGPT, an AI language model by OpenAI.</p> <p>&nbsp;</p>
  • Geographic Coverage: San Francisco, CA
  • Type: Still Image
  • Format: Negative
  • Source: San Francisco State University Archives
  • Rights: Public

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